This is getting a little desperate, haha.
I'm just spitting out theories here. I mean we have three human helpers to the Go-Busters, 2 of which could totally be rangers. The toyline is sort of implying that we're getting zords in sets of 2. Green and Pink are on there, they could have just painted it Red, Blue, Yellow over and over. But they didn't, maybe theres a reason. Yeah its a little desperate, but i'd say mostly I'm just noticing coincidences, but still. I want a GreenBuster.
We had tons of different colored headers, and got GoseiKnight only. And a GoseiGreen with no mecha that was apparently not even worthy being ever remembered.
I would say that Goseiger isn't a really good example of what i'm talking about. And don't even mention GoseiGreen to me, that whole subplot was nothing more than a cocktease and a complete waste of time. I was desperate for a ranger to show up that i would really like (none of them really did it for me, not to mention that GoseiGreat makes me cringe.)